Browse Prior Art Database

Circuit Interruption Via Cable Interface

IP.com Disclosure Number: IPCOM000076546D
Original Publication Date: 1972-Mar-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Cobb, NH: AUTHOR [+3]

Abstract

This device provides for the addition of engineering changes and circuit feature additions to be made to some circuit boards, without the requirement of new boards for each change. The feature is described as it would be used for the addition of an extra set of contacts for control by a new function in a power supply.

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Circuit Interruption Via Cable Interface

This device provides for the addition of engineering changes and circuit feature additions to be made to some circuit boards, without the requirement of new boards for each change. The feature is described as it would be used for the addition of an extra set of contacts for control by a new function in a power supply.

As indicated in the drawing, a basic card 1 in the processor will carry a power-on testing circuit comprising a power source and a series string of normally-open relay contacts 3, 4, and 5, together with the dotted line contacts 6. Each set of contacts is controlled by a relay and is closed when an associated one of the voltage sources is energized. When all contact sets 3, 4, 5, and 6 are operated, a relay 8 is energized to close its contacts 9 and energize the power- on indicator light 10. When a new set of contact points is to be inserted into the series of contacts, the relay for one set of contacts, here contacts 6, is pulled from its socket and a new card bearing the new printed wiring and required relay sockets is inserted in the socket. The new card 15 will have a socket for the relay, here shown as 16, extracted from card 1 and for any new relays, such as 17, needed for the added function. A new set of contacts 18 on relay 17 is put in series with the original set of contacts 6 on relay 16 to add the extra control. Relay 16 will be energized by connections to the same set of socket contacts as origin...